Tool-post for lathes.



No. 679,297, Y Patented luly 30, |90l.

' B, CBURN.

TOUL PDST FDR LATHES.

(Application led Feb. 14, 1901.)

(No M odel.)

UNITED STATES PATENT OEETCE.

BYRON COBURN, OF LEROY, NFV YORK.

TOOL-POST FOR LATI-IES..

SPECIFICATION forming part 0f Letters Patent N0. 679,297, dated July 30, 1901.

Application filed February 14, 1901. Serial No. 47,270. (No model.)

To all whom it' may concern,.-

Be it known that I, BYRON COBURN, a citizen of the United States, residing at Leroy, in the county of Genesee and State of New York, have invented a new and useful Tool- Post for Lathes, ot which the following is a specification. y

This invention relates to toolposts for lathes; and it has for its object to provide a device of the character referred to which will permit or various adjustments toward and away from the work or parallel with the work 'orin a vertical direction.

In connection with the tool-post proper I provide a rocker-support for the tool, in conjunction with which a slide is used, which slide is carried by and mounted for movement on the rocker-support and employed in connection with suitable operating means also carried by the rocker-support, the slide having means for interlocking with the tool for feeding the latter toward and away from the work.

The invention also contemplates the use in connection with the rocker-support and tool of a superimposed clamping-block hung from the head of the post and adapted to be held by means of one or more set-screws.

Another' object of the invention is to provide means on the tool-post for preventing the latter from rotating relatively to the bed-plate.

The invention also contemplates the use of a bed-piece in which provision is made for the employment'of two separate and independent tool-posts, in connection with which tools of n ovel shape and construction may be employed for producing cuts of different depths or characters at the same time.

The detailed objects and advantages of the invention will appear more fully in the course of the ensuing description.

The invention consists in certain novel features and details of construction and arrangenient 'of parts, as hereinafter fully described, illustrated in the drawings, and incorporated in the claims.

In the accompanying drawings, Figure l is a perspective view of a tool-post constructed in accordance with the present invention, showin g the same applied to the bed-piece and equipped with a tool and the holding and feeding devices therefor. Fig. 2 is a detail perspective View of the tool-postper1 se. Fig. 3 is a vertical central section taken through the parts illustrated in Fig. 1. Fig. 4 is a similar section taken at right angles to Fig. 3. Fig. 5 is a plan View illustrating the manner of using twin tool-posts.

Similar numerals of reference designate corresponding parts in all igures of'the drawings.

Referring to the drawings, l designates the bed-piece or carriage upon which one or more tool-posts are adapted to be mounted, as illustratedin Fig. 5, the said bed-piece being provided with a grooved portion 2, in which the lower ends of the tool-posts are mounted and held in the manner. which will hereinafter appear. Each of the posts is provided at its lower end with a head or collar 3, which fits the groove 2 for permitting the post to be adjusted laterally, while at the same time being prevented from escaping from the bed-piece. In order to prevent the post from rotating Awhen the lathe is being operated for cutting threads, dro., the said post is provided with a dovetail groove et for the reception of a removable key 5 of dovetail shape in cross-section and tapered from end-to end, said key when in place being adapted to bear iiatwise against one of the walls or side faces of the groove 2 in the manner illustrated in the cross sectional view,Fig. 3. The key 5 maybe easily removed Whenever it is desired to obtain an axial adjustment of the tool-post.

6 designates an annular tool-seat, which is adapted to rest and slide upon the bed-piece and is provided with diametrically-opposite notches 7, forming socket-bearings for the opposite end portions of the fulcrum-pin 8, upon which is mounted a rocker-support 9, which passes through a longitudinal slot lO in the tool-post. The fulcrum-pin 8 is provided at a point intermediate its length within an enlargement ll, which may comprise a plurality of hat faces, each of which forms a seat for.

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holding the same in contact with the toolseat 6. Above the side lugs 13 the post is longitudinally recessed, as at 14, to permit application of a wrench to the head of the bindingscrew 12.

The rocker-support 9 passes through a slot 10 in the tool-post and projects from ea ch side thereof to form a rest for the tool 15, the cutting-point of which may be of any desired shape or configuration. vided with a depending portion 16, having a transverse opening for the passage of the ful-` crum-pin 8, and the post proper is also pro-` vided with oppositely-located longitudinal slots 17, allowing for the movement up and` down of the fulcrum-pin 8, thereby providing 'for the vertical adjustment of the rocken l support 9 and the consequent elevation or depression of the cutting-tool 15.

The rocker-support 9 is cut away or recessed, as shown at 18, and in sueh'reeess is placed a feeding-slide 19, having a projection or knob 20, adapted to enter any one of a series of sockets 21 in the shank of the eutting-tool 1.5, thus sccurin g an interlocked engagement between the feed-slide 19 and the cutting-tool, which engagement permits of' relative adjustment between the feed-slide and the tool, so that the tool may be primarily set nearer to or farther from the work, as may be required. The feed-slide is progroove 26, in which ts a key 27, carried by the rocker-support, which key prevents longitudinal movement of the feed-screw relatively to the rocker-support, while admitting of the free rotation thereof for the purpose of advancing or reti-acting the feed-slide and correspondingly advancing or retracting the cutting-tool engaged with the slide.

superimposed above the rocker-support is a clamping block or gib 28, which passes through the slot 10 in the post and is adapted to bear throughout its length against the upper edge of the cutting-tool 15 for holding said tool rigidly in place on the rocker-support and at the same time holding the rockersnpport rigid. The clamping-block 2S is provided with a concaved upper surface 29, designed to be engaged by the lower ends of a pair of set-screws 30, threaded through the post-head 3l, the said screws serving to bear firmly against the clamp-block for the purpose of rigidly holding said block and causing it to firmly clamp the tool and rocker sup- Iport against movement after the parts have been adjusted to the proper position and relation to the work. The lower surface of the `f post-head 31 is rounded or convexed, as shown at 32, in order to admit of the free tilting movement of the clamping-block, as required.

The clamping-block is hung from the posthead by means of a threaded shank or stem 33, having a head 34, arranged in a recess 35 The support 9 is proin the bottom of the clamping-block, and covered by means of a plate 36, secured to the lower surface'of the block. The stem passes through the slot 37 in the block, thus permitting the block to rock relatively to the stem for accommodating the tilting movements thereof. The stern also passes through an opening 38 in the post-head, where it receives an adjusting-nut 39, by means of which the clamping-block is not only hung from the post-head, but is capable of being adjusted np or down to suit the size of the tool-shank.

From the foregoing description it will be seen that the tool feeding mechanism is mounted solely upon and carried entirely by the rocker-support and that the tool has an interlocked engagement with the feed-slide, controlled and operated by and forming a part of the feeding device.` It will also be seen that the tool may be adjusted relatively to the feed-slide and that by means of the clamping-block the tool and ,rocker-support therefor may be lirmly clamped in any adjusted position. It will also be observed that I have provided efficient means for preventing accidental rotation of the tool-post when the machine is being used for cutting threads, for instance. It Will be observed, further, that the tool may be readily removed and another replaced and that when it becomes necessary the several parts of the device as a whole may be detached and, if desired, entirely removed from the bed of the lathe. It is also practicable to employ twin tool-posts and arrange the same side by side, as shown in Fig. 6, for making two separate cuts simultaneously, in which event the shank of the tool 15 will be bent or extended laterally intermediate its ends, as indicated at 40, the

shanks of the two tools being bent or extended laterally in reverse directions, so as to bring their cutting-points near together, as illustrated in Fig. 5. Under this arrangement one of the tools may make the iirst rough cut, while the adjoining tool may be utilized for producing the lighter or Iinishing cut. The screws l2 serve to draw the toolpost upward and force the annular tool-seat o' downward, so as to clamp the post tightly to the bed-piece or carriage.

From the foregoing it is thought that the construction, operation, and man-y advantages of the herein-described tool-post for lathes will bereadily apparent to those skilled in the art without further description, and it will be understood that various changes in the form, proportion, and minor details of construction may be resorted to without departing from the principle 0r sacrificing any of the advantages of this invention.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is-

1. The combination with a lathe tool-post, of a tool-clamping block hung from the head of the post.

2. The combination with a lathe tool-post,

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of a tool-clamping block hung from the post, and means connected with the block for effecting vertical adjustment thereof.

3. The combination With a lathe tool-post, of a pivoted rocking tool-support, and a suspended tool-clamping block adjustable independently of the said support.

4E. The combination with a tool-post, of a rocking tool-support, and a toolclamping block, the support and block being adjustable to different positions by independentlyoperating means.

5. The combination with a lathe tool-post, of a pivoted rocker-support for the tool, and a tool-clamping block carried by the tool-post and arranged to bear against the upper side of the tool.

6. The combination with a lathe tool-post, of a pivoted rocker forming a tool-support, a tool-clamping block hung above the rocker, and means for fastening said block.

7. The combination with alathe tool-post, of a pivoted rocker forminga tool-support, a toolclamping block hung above the rocker, means for adjusting the said clamping-block, up and down, and means for fastening the block.

8. The combination with a lathe tool-post provided with a fixed head, of a rocker forminga tool-support, a tool-clam ping block hung from the tool-post, and a plurality of bindingscrews on the post-head adapted to bear against said block.

9. The combination with a lathe tool-post, of a rocker-support for the tool, a concavefaced tool-clamping block hung from the toolf post and one or more set-screws adapted to cooperate with said block.

10. The combination with a lathe tool-post, of a rocker-support for the tool, tool-feeding means carried by the rocker-support, and a tool-clamping block hung from the tool-post.

1l. The combination with a lathe tool-post, of a rocker-support for the tool, tool-feeding means mounted solely on the rocker-support, and a tool-clamping block hung from the toolpost.

12. The combination with a lathe tool-post,

of a rocker-support for the tool, a tool-feeding slide thereon, means for moving said slide on the support, and a tool-clamping block hung from the tool-post.

13. The combination with a lathe tool-post, of a rocker-support for the tool, a tool-feeding slide mounted for movement on the rockersupport, means for advancing and reti-acting said slide, and a tool-clamping block hung from the tool-post.

let. The combination with a lathe tool-post, of a rocker-support for the tool, a tool-feedin g slide on the rocker-support, Va feed-screw cooperating With the slide, and a tool-clamping block hung from the tool-post.

15. The combination With a lathe tool-post, of a rocker-support for the tool, a tool-feeding. slide on the rocker-support, operating means for the slide,toolengaging means on the slide, and a tool-clamping block hung from the toolpost.

16,. The combination with a lathe tool-post, of a rocker-support for the tool, a tool-feeding slide on the rocker-support having means to interlock with the tool, and operating lmeans for the slide.

17. The combination with a lathe tool-post, of a rocker-support for the tool, a tool-feeding slide on the rocker-support having atool-engaging projection, and operating means for the slide.

18. The combination With a lathe tool-post, of a tool, a rocker-support for the tool, a tool'- feeding slide on the rocker-support, operating means for the slide, and interlocking means on the tool and slide admitting of relative adjustment between the same.

19. The combination with a lathe toolpost, of a tool having a series of sockets, a rockersupport for the tool, a tool-feeding slide on the rocker-support having a projection for engagment with the sockets in the tool, and operating means for the slide.

20. The combination with a lathe tool-post, of a rocker-support for the tool, means for clamping the tool thereon, a removable fulcrum-pin upon which the rocker is mounted, and means on the post for holding the pin at desired adjustments.

2l. The combination with a lathe tool-post,

of a rocker-support for the tool, means for clamping and holding the tool thereon, a removable fulcrum-pin for the rocker, said pin being provided with a screw-seat, and a binding-screw on the post cooperating with said screw-seat.

22. The combination with a grooved bedpiece, of a lathe tool-post having a head slidably fitted in the grooved bed-piece and provided With a keyWay lying Within the plane of the groove, and a key detachably mounted in said groove and adapted to bear against one of the Walls of the groove for preventing rotation of the post relatively to the bed-piece.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

` BYRON COBURN.

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